Ricciardi's Law is a principle in the field of ecology that states that the number of species in a given area is proportional to the area itself. This means that larger areas tend to support more species due to the increased availability of habitats and resources. The law highlights the importance of habitat size in biodiversity. It suggests that conservation efforts should focus on protecting larger habitats to maintain and enhance species diversity, as smaller areas may not support as many species due to limited resources and space.